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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang crashes on c++17 class template deduction argument types of function pointers"
href="https://bugs.llvm.org/show_bug.cgi?id=41455">41455</a>
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<th>Summary</th>
<td>clang crashes on c++17 class template deduction argument types of function pointers
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++'17
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>baruchs@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Any attempt to deduce the arguments of a function pointer with C++17 class
template deduction results in clang crashing.
The same code works on clang 6.0.0, but no longer works on clang 7.0.0, 8.0.0,
and current trunk.
The following complier explorer link reproduces the crash
<a href="https://godbolt.org/z/SKT-Fh">https://godbolt.org/z/SKT-Fh</a>
----- .cpp file -------
template<typename... arg_types>
struct wrapper
{
wrapper(void (*f)(arg_types...));
};
void f(int a);
void g()
{
auto w = wrapper(f);
}
-----------------------</pre>
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